Prefabricated pipe pile pre-coring structure and its pouring method

Abstract

The application relates to a prefabricated pipe pile pre-coring structure and a pouring method thereof. The prefabricated pipe pile pre-coring structure comprises a pipe pile with an internal hollow, a steel reinforcement cage which can be inserted into the pipe pile, a blocking assembly which is used for realizing the blocking of part or whole internal space of the pipe pile as a pouring space when the steel reinforcement cage is inserted into the pipe pile, the blocking assembly comprises a sealing plate which is connected to a first end of the steel reinforcement cage and a compaction plate which is adjustably sleeved on the steel reinforcement cage, a first through hole for a corresponding main reinforcement is arranged on the compaction plate at a position corresponding to each main reinforcement of the steel reinforcement cage, and the outer periphery of the sealing plate and the compaction plate is matched with the inner periphery of the pipe pile, so that a pouring space with an adjustable size is formed by matching the pipe pile; a grouting assembly which is used for pouring concrete into the pouring space, the grouting assembly is arranged on the steel reinforcement cage or the blocking assembly. The pipe pile can be cored before being pressed into the ground, the cored material is further compacted by the compaction plate and air is discharged, the compactness of the pre-coring pipe pile is ensured, and the construction efficiency is high.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a prefabricated pipe pile pre-cast core structure and a casting method thereof. Background Art

[0002] The conventional construction method for bored piles in existing technology is to drive the pile into the ground. After excavation exposes the pile head, the soil that has fallen into the hollow part of the pile is cleaned, a steel cage is placed, and finally concrete is poured. Under this process, the hollow part of the hollow pile will be filled with soil after being driven into the ground, which increases the subsequent cleaning process. Workers need to clean and dig out the soil from the pile core one by one and transport it outside the foundation pit, which is extremely inefficient. Therefore, pre-casting the core before driving it into the ground is different from pouring the core when the pipe pile is in a vertical position after being driven into the ground. At this time, the density of the core material is easily guaranteed under the action of gravity. Due to limited construction space, the pipe pile can only be placed horizontally when pre-casting the core on the ground. When the pipe pile is placed horizontally, the density of the core is difficult to guarantee. Summary of the Invention

[0003] In order to solve the above problems, a prefabricated pipe pile pre-core structure and a pouring method thereof are provided. Before the pipe pile is pressed into the ground, it can be cored, and the core material is further compacted and the air is expelled by a compacting plate, so that the density can be guaranteed.

[0004] A prefabricated pipe pile pre-cast core structure comprises: a pipe pile with a hollow interior, a steel cage insertable into the pipe pile, a blocking assembly for closing part or all of the interior space of the pipe pile as the steel cage is inserted into the pipe pile to serve as a casting space, the blocking assembly comprising a sealing plate connected to a first end of the steel cage and a compaction plate adjustably mounted on the steel cage, a first through hole for the corresponding main reinforcement being passed through being opened on the compaction plate at a position corresponding to each main reinforcement of the steel cage, the outer peripheries of the sealing plate and the compaction plate being adapted to the inner periphery of the pipe pile to achieve the casting space of adjustable size formed in cooperation with the pipe pile; a grouting assembly for pouring concrete into the casting space, the grouting assembly being arranged on the steel cage or the blocking assembly.

[0005] A further improvement of the present invention is that it also includes a lifting rod, the first end of which is fixed to the sealing plate, and the second end is formed with a threaded section, and a second through hole is opened on the compacting plate for the threaded section to pass through. It also includes a nut arranged on the side of the compacting plate facing away from the casting space and corresponding to the second through hole, and the part of the threaded section passing through the second through hole is threadedly connected to the nut.

[0006] A further improvement of the present invention is that the steel cage includes a plurality of main bars extending axially along the pipe pile, and the plurality of main bars are arranged in a circle along the circumference of the pipe pile; stirrups are tied at intervals along the vertical direction on the outside of the main bars, and the compaction plate is located between two adjacent stirrups.

[0007] A further improvement of the present invention is that the grouting assembly includes a slurry inlet pipe and a slurry outlet pipe connected to the compaction plate and communicated with the interior of the steel cage, and the pipe body of the slurry outlet pipe is transparent.

[0008] A further improvement of the present invention is that the grouting assembly includes an auxiliary grouting tube for being sleeved outside the steel cage and arranged inside the pipe pile, the auxiliary grouting tube is open at both ends, and a grouting groove connected to the interior of the auxiliary grouting tube is opened on the side wall of the auxiliary grouting tube, and the length of the auxiliary grouting tube is greater than the length of the casting space.

[0009] A further improvement of the present invention is that the second end of the auxiliary perfusion tube is provided with a handle for facilitating the insertion or extraction of the auxiliary perfusion tube into or out of the pipe pile.

[0010] The pouring method of the prefabricated pipe pile pre-filled core structure comprises the following steps:

[0011] S1. Place the pile horizontally and move the compaction plate so that the distance between the compaction plate and the sealing plate is greater than the designed length of the cast-in-place pile;

[0012] S2, inserting the steel cage into the inner hollow part of the pipe pile, and pouring the grouting material into the pouring space through the grouting assembly;

[0013] S3, moving the compacting plate toward the sealing plate so that the distance between the compacting plate and the sealing plate is equal to the designed length of the cast-in-place pile, and discharging the air in the casting space during the movement;

[0014] S4, after the injection material is solidified and formed, the compacting plate is removed.

[0015] A further improvement of the present invention is that the grouting assembly comprises a grouting pipe and a grouting pipe connected to the compacting plate and communicating with the interior of the reinforcement cage. When executing step S2, the grouting material is poured into the pouring space through the grouting pipe until grout is seen to emerge from the grouting pipe, whereupon the pouring is stopped.

[0016] When executing step S3, the pipe pile is knocked to help expel the air in the pouring space. If no slurry comes out of the slurry pipe, the pouring material is continued to be poured into the pouring space, and step S3 is repeated until slurry comes out of the slurry pipe again.

[0017] A further improvement of the present invention is that the grouting assembly is an auxiliary grouting tube, which is open at both ends and has a grouting groove connected to the interior of the auxiliary grouting tube on its side wall, and the length of the auxiliary grouting tube is greater than the length of the casting space; when executing step S2, the steel cage is sleeved in the auxiliary grouting tube, and the auxiliary grouting tube and the steel cage sleeved therein are slowly pushed into the pipe pile. During the pushing process, the grouting material is continuously poured into the auxiliary grouting tube near the end of the pipe pile until the space between the sealing plate and the compacting plate in the auxiliary grouting tube is completely filled, and the auxiliary grouting tube is pulled out after filling;

[0018] When executing step S3, the compaction plate is moved toward the sealing plate so that the distance between the compaction plate and the sealing plate is equal to the designed length of the bored pile, and the pouring material is completely filled in the pouring space, and the air in the pouring space is discharged during the movement.

[0019] The prefabricated pipe pile pre-filling core structure and the filling method thereof provided by the present invention can achieve filling of the core before the pipe pile is pressed into the ground, and further compacting the filling core material and exhausting the air by the compacting plate, thereby ensuring the density. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the invention;

[0021] Figure 2 For invention Figure 1 The cross-sectional view at 1-1 in FIG;

[0022] Figure 3 For the present invention Figure 1 The cross-sectional view at 2-2 in the figure;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the auxiliary perfusion cylinder of the present invention;

[0024] Figure 5 A side view of the auxiliary perfusion cylinder of the present invention;

[0025] Figure 6 Schematic diagram of the internal structure of the pipe pile of the present invention;

[0026] Figure 7 This is a schematic diagram of the core filling preparation stage according to the second embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the core filling process according to the second embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the second embodiment of the present invention when the core filling is completed;

[0029] Figure 10 This is a schematic diagram of the second embodiment of the present invention when the auxiliary perfusion cylinder is pulled out;

[0030] Figure 11 This is a schematic diagram of the second embodiment of the present invention when a steel bar protective cover is installed;

[0031] Figure 12 This is a schematic diagram of the core filling process according to the first embodiment of the present invention;

[0032] Figure 13 This is a schematic diagram of the first embodiment of the present invention when a steel bar protective cover is installed;

[0033] In the figure: 1. Threaded section fixing steel bar; 2. Threaded section; 3. Nut; 4. Gasket; 5. Compacting plate; 6. Compacting foam board; 7. Sealing plate; 8. Sealing foam board; 9. Main reinforcement; 10. Stirrups; 11. Auxiliary grouting tube; 12. Handle 13. Pipe pile; 14. Hollow part inside the pipe pile; 15. Micro-expansive concrete; 16. Vibrating rod; 17. Gap; 18. Steel bar protective cover 19. Slurry inlet pipe; 20. Slurry outlet pipe; 21. High-strength grouting material. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] like Figures 1 to 13 As shown, a prefabricated pipe pile pre-cast core structure includes: a pipe pile 13 with a hollow interior, a steel cage that can be inserted into the hollow part 14 of the pipe pile 13, and a blocking component for closing part or all of the internal space of the pipe pile 13 as a casting space as the steel cage is inserted into the pipe pile 13. The blocking component includes a sealing plate 7 connected to the first end of the steel cage and a compacting plate 5 that is adjustably mounted on the steel cage. The compacting plate 5 is provided with a first through hole for the corresponding main reinforcement 9 to pass through at a position corresponding to each main reinforcement 9 of the steel cage. The outer periphery of the sealing plate 7 and the compacting plate 5 are adapted to the inner periphery of the pipe pile 13 to form the casting space with adjustable size in cooperation with the pipe pile 13; a grouting component for pouring concrete into the casting space, and the grouting component is arranged on the steel cage or the blocking component.

[0036] like Figures 1 to 3 As shown, it also includes a lifting rod, the first end of which is fixed to the sealing plate 7, and the second end is formed with a threaded section 2. A second through hole for the threaded section 2 to pass through is opened on the compacting plate 5. It also includes a nut 3 provided on the side of the compacting plate 5 facing away from the casting space and corresponding to the second through hole, and the part of the threaded section 2 passing through the second through hole is screwed and connected to the nut 3.

[0037] like Figure 1As shown, in this embodiment, a sealing foam plate 8 is further provided on the side of the sealing plate 7 close to the pouring space; a compacting foam plate 6 is further provided on the side of the compacting plate 5 close to the pouring space.

[0038] Preferably, if Figure 1 、 3 As shown, in this embodiment, a gasket 4 is sandwiched between the compacting plate 5 and the nut 3.

[0039] like Figure 1 As shown, the steel cage further includes a plurality of main bars 9, and the plurality of main bars 9 are arranged in a circle along the circumference of the pipe pile 13; stirrups 10 are tied to the outside of the circle of main bars 9 at intervals along the vertical direction, and the compaction plate 5 is located between two adjacent stirrups.

[0040] like Figure 1 、 3 As described in , 12 and 13, the grouting assembly includes a slurry inlet pipe 19 and a slurry outlet pipe 20 connected to the compaction plate 5 and communicating with the interior of the steel cage, and the slurry outlet pipe 20 is transparent.

[0041] like Figures 4-5 As shown, the grouting assembly includes an auxiliary grouting tube 11 for being sleeved outside the steel cage and inside the pipe pile 13.

[0042] The auxiliary grouting tube 11 is open at both ends, and a grouting groove communicating with the interior of the auxiliary grouting tube 11 is provided on the side wall of the auxiliary grouting tube 11 . The length of the auxiliary grouting tube 11 is greater than the length of the casting space.

[0043] Preferably, if Figures 4-5 As shown, one end of the auxiliary perfusion tube 11 is provided with a handle 12 for facilitating the insertion or extraction of the auxiliary perfusion tube 11 into or out of the pipe pile 13 .

[0044] The pouring method of the pre-filled core structure of the pipe pile of the present invention is as follows: Figures 7-13 As shown, the following steps are included:

[0045] S1. Place the pile 13 horizontally and move the compacting plate 5 so that the distance between the compacting plate 5 and the sealing plate 7 is greater than the designed length of the cast-in-place pile;

[0046] S2, inserting the steel cage into the inner hollow part of the pipe pile 13, and pouring the grouting material into the pouring space through the grouting assembly;

[0047] S3, move the compacting plate 5 in the direction close to the sealing plate 7, so that the distance between the compacting plate 5 and the sealing plate 7 is equal to the designed length of the cast-in-place pile, and exhaust the air in the pouring space during the movement;

[0048] S4, after the cast material solidifies and forms, the compacting plate 5 is removed.

[0049] Another embodiment of the grouting method of the pre-cast core structure of the pipe pile of the present invention, in this embodiment, the grouting assembly is connected to the compaction plate 5 and communicated with the interior of the steel cage 19 and the grouting pipe 20, such as Figures 12-13 As shown, when executing step S2, the pouring material is poured into the pouring space through the slurry inlet pipe 19 until slurry is seen to emerge from the slurry outlet pipe 20, and then the pouring is stopped;

[0050] When executing step S3, the pipe pile 13 is knocked to help expel the air in the pouring space. If no slurry comes out of the slurry pipe 20, the pouring material is continued to be poured into the pouring space, and step S3 is repeated until slurry comes out of the slurry pipe 20 again.

[0051] Preferably, in this embodiment, the grouting material is a high-strength grouting material 21 .

[0052] Another embodiment of the grouting method of the pre-cast core structure of the pipe pile of the present invention, the grouting assembly in this embodiment adopts an auxiliary grouting tube 11, the auxiliary grouting tube 11 is open at both ends, and a grouting groove connected to the interior of the auxiliary grouting tube 11 is opened on the side wall of the auxiliary grouting tube 11. The length of the auxiliary grouting tube 11 is greater than the length of the casting space. Figures 7-11 As shown, when executing step S2, the steel cage is placed in the auxiliary grouting tube 11, and the auxiliary grouting tube 11 and the steel cage placed therein are slowly pushed into the pipe pile 13. During the pushing process, the grouting material is continuously poured into the auxiliary grouting tube 11 through the grouting groove near the end of the pipe pile 13 until the auxiliary grouting tube 11 is completely filled between the sealing plate 7 and the compacting plate 5. After filling, the auxiliary grouting tube 11 is pulled out;

[0053] When executing step S3, the compacting plate 5 is moved in the direction of the sealing plate 7 so that the distance between the compacting plate 5 and the sealing plate 7 is equal to the design length of the bored pile, and the casting material is completely filled in the casting space, and the air in the casting space is discharged during the movement; the difference between the distance between the compacting plate 5 and the sealing plate 7 and the design length of the bored pile can be calculated, and the difference must satisfy the requirement in step S3 that when the distance between the compacting plate 5 and the sealing plate 7 is equal to the design length of the bored pile, the air in the casting space is discharged.

[0054] Preferably, in this embodiment, the pouring material is micro-expansive concrete 15 .

[0055] Preferably, if Figures 7 to 11 As shown, in this embodiment, a vibrating rod 16 is used to vibrate while pouring the pouring material.

[0056] like Figure 11 、 13 As shown, after the pouring is completed and the compaction plate 5 is removed, a steel bar protection sleeve 18 is sleeved on the second end of the steel bar cage.

[0057] Preferably, a plurality of completed pipe piles 13 can be spliced ​​together to meet the length requirement of the pile foundation of the building project during construction.

[0058] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A prefabricated pipe pile pre-filled core structure, characterized in that: include: A hollow pipe pile and a steel cage that can be inserted into the pipe pile, which is used to close part or all of the internal space of the pipe pile as the steel cage is inserted into the pipe pile to serve as a blocking component for pouring space, the blocking component includes a sealing plate connected to the first end of the steel cage and a compacting plate that is adjustably mounted on the steel cage, and a first through hole for the corresponding main reinforcement to pass through is opened on the compacting plate at the position corresponding to each main reinforcement of the steel cage, the outer periphery of the sealing plate and the compacting plate are adapted to the inner periphery of the pipe pile to form the pouring space with adjustable size in cooperation with the pipe pile; a grouting component for pouring concrete into the pouring space, the grouting component is arranged on the steel cage or the blocking component.

2. The prefabricated pipe pile pre-filled core structure according to claim 1, characterized in that: It also includes a lifting rod, the first end of which is fixed to the sealing plate, and the second end is formed with a threaded section, and the compacting plate is provided with a second through hole for the threaded section to pass through. It also includes a nut arranged on the side of the compacting plate facing away from the casting space and corresponding to the second through hole, and the part of the threaded section passing through the second through hole is threadedly connected to the nut.

3. The prefabricated pipe pile pre-filled core structure according to claim 1, characterized in that: The steel cage includes a plurality of main bars extending axially along the pipe pile, and the plurality of main bars are arranged in a circle along the circumference of the pipe pile; stirrups are tied at intervals along the vertical direction on the outside of the main bars, and the compaction plate is located between two adjacent stirrups.

4. The prefabricated pipe pile pre-filled core structure according to claim 1, characterized in that: The grouting assembly includes a slurry inlet pipe and a slurry outlet pipe connected to the compaction plate and communicated with the interior of the steel cage, and the pipe body of the slurry outlet pipe is transparent.

5. The prefabricated pipe pile pre-filled core structure according to claim 1, characterized in that: The grouting assembly includes an auxiliary grouting tube for being sleeved outside the steel cage and arranged inside the pipe pile. The two ends of the auxiliary grouting tube are open, and a grouting groove connected to the interior of the auxiliary grouting tube is opened on the side wall of the auxiliary grouting tube. The length of the auxiliary grouting tube is greater than the length of the casting space.

6. The prefabricated pipe pile pre-filled core structure according to claim 5, characterized in that: The second end of the auxiliary perfusion tube is provided with a handle for facilitating the insertion or extraction of the auxiliary perfusion tube into or from the pipe pile.

7. A method for pouring a precast pipe pile pre-cast core structure according to claim 1, characterized in that: The following steps are involved: S1. Place the pile horizontally and move the compaction plate so that the distance between the compaction plate and the sealing plate is greater than the designed length of the cast-in-place pile; S2, inserting the steel cage into the inner hollow part of the pipe pile, and pouring the grouting material into the pouring space through the grouting assembly; S3, moving the compacting plate toward the sealing plate so that the distance between the compacting plate and the sealing plate is equal to the designed length of the cast-in-place pile, and discharging the air in the casting space during the movement; S4, after the injection material is solidified and formed, the compacting plate is removed.

8. The method for grouting a precast pipe pile precast core structure according to claim 7, wherein the grouting assembly is a grouting pipe and a grouting pipe connected to the compaction plate and communicating with the interior of the steel cage, characterized in that: When executing step S2, pouring the pouring material into the pouring space through the slurry inlet pipe until slurry is seen to emerge from the slurry outlet pipe, and then stopping the pouring; When executing step S3, the pipe pile is knocked to help expel the air in the pouring space. If no slurry comes out of the slurry pipe, the pouring material is continued to be poured into the pouring space, and step S3 is repeated until slurry comes out of the slurry pipe again.

9. The pouring method of the prefabricated pipe pile pre-filled core structure according to claim 7, characterized in that: The grouting assembly is an auxiliary grouting tube, which is open at both ends and has a grouting groove connected to the interior of the auxiliary grouting tube. The length of the auxiliary grouting tube is greater than the length of the casting space. When executing step S2, the steel cage is placed in the auxiliary grouting tube, and the auxiliary grouting tube and the steel cage placed therein are slowly pushed into the pile. During the pushing process, the grouting material is continuously poured into the auxiliary grouting tube near the end of the pile until the auxiliary grouting tube is completely filled between the sealing plate and the compacting plate. After the auxiliary grouting tube is filled, the auxiliary grouting tube is pulled out; When executing step S3, the compaction plate is moved toward the sealing plate so that the distance between the compaction plate and the sealing plate is equal to the designed length of the bored pile, and the pouring material is completely filled in the pouring space, and the air in the pouring space is discharged during the movement.

10. The pouring method of the prefabricated pipe pile pre-filled core structure according to any one of claims 7 to 9, characterized in that: After the pouring is completed and the compaction plate is removed, a steel bar protection sleeve is sleeved on the second end of the steel bar cage.

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